CVE-2026-46331

In the Linux kernel, the following vulnerability has been resolved: net/sched: fix pedit partial COW leading to page cache corruption tcf_pedit_act() computes the COW range for skb_ensure_writable() once before the key loop using tcfp_off_max_hint, but the hint does not account for the runtime header offset added by typed keys. This can leave part of the write region un-COW'd. Fix by moving skb_ensure_writable() inside the per-key loop where the actual write offset is known, and add overflow checking on the offset arithmetic. For negative offsets (e.g. Ethernet header edits at ingress), use skb_cow() to COW the headroom instead. Guard offset_valid() against INT_MIN, where negation is undefined.

Affected products

Linux Kernel, Rocky Linux

Linux Linux Kernel

< 4.20, 5.5, 5.11, 5.16, 5.18, 6.12.94, 6.18.36, 7.0.13, 7.1

Fix

Available

CVSS 3.1

7.8 HIGH

EPSS

0.5% (42th percentile)

Weakness

CWE-190, CWE-787

NVD status

Modified

Published

2026-06-16